This spooky slime recipe is perfect for Halloween! Stretch it, squish it, pull it or just pick the bugs out of it!
Easy Slime Recipe for Halloween
There are lots of different recipes on the internet for slime, but this is the one that has worked the best for us.
What you need to make no borax slime
¾ cup of PVA glue
¼ cup of water
1 teaspoon bicarbonate of soda
Food colouring
1 tablespoon saline solution
Glitter and other decorations – optional
All you need to do is mix the ingredients together, adding the saline last. The mixture will start to stick together as soon as you stir in the saline solution ( slime activator ). It’s great fun to watch and do!
Slime Challenges
Can you mix slime colours to make a new colour? Our yellow and blue slime made green slime!
How far can you stretch the slime?
Can you find the perfect slime recipe by changing the amount of glue, water and baking soda?
Work as a team to make a slime sheet!
The engineering of slime
Slime is called a non-Newtonian fluid because its viscosity changes with changes in pressure or temperature. Another very simple non -Newtonian fluid can be made using just cornflour and water. This sticks together to form a solid when pressure is applied ( you squeeze it in your hands ) and flows when pressure is released.
Using slime to learn about polymers
Slime is a great activity for learning about polymers!
Glue flows because the polymer chains slide over each other easily. The saline solution reacts with baking soda to form borate which forms bonds between the polymer chains of the glue. This is called cross linking and is what makes the slime mixture stick together.
If you enjoyed this post, we’ve got lots of more easy Halloween Science Experiments and Halloween STEM Challenges for you to try.
Last Updated on September 29, 2022 by Emma Vanstone